Hi Helium,
I do not have much experience with the TC series from Corrson. They are the entry level line from them. They use some high end drivers from Vifa and knowing the designer very well, I am sure they will sound just fine. I cannot do a direct comparison between them and other speakers because I have not done it myself.
If you are serious about AP/Corrson, you should be looking their MS series or even the higher models that come with scanspeak drivers. They will easily beat the audience series and the 600 series from B&W across the spectrum. In fact comparing the scan speak driver models with the above mentioned speakers is unimaginable.
I agree with Arj that with the right kind of amplification, cabling (read expensive), the audience speakers can sound good. I am not a fan of the dyna audience voicing hence stay clear of them. The contour speakers are good.